[Perfect Compatibility]Battery Adapter for battery 18V adopt Superb craftsmanship which the size measured and controlled strictly, so that the battery converter compatible with 18V battery perfectly and stable lock on the battery.[Quality Material] wheels battery adapter for comes with black & red 14 guage tinned copper wires,protects them from corrosion and making it easier to solder.Covers with PTFE FEP which resists high & low temperature, water, oil, chemicals and abrasion. Morever, Battery converter constructs with premium silicone rubber insulation which will not melt when exposed to high temperatures.(Note:Max Heat Resistance temperature Within 200Celsius )[Easy To Use]Upgrade your wheels/toys or robotics diy which is easy to use. As long as the battery is installed into the connector, it can be easily to connect the battery to your devices. Just need to move the mount connector to the inside of the groove gently, then install the battery into the connector.Meanwhile, battery adopter has compact size and lightweight, which is convenient to carry and will not bring you any burden.[Wide Usages] battery connector is compatible with most types of 18V lithium batteries like BL1830 BL1840 BL1850 BL1860 BL1840B BL1850B BL1860B BL1820. You can use it to upgrade your wheels,toys, robotics, electric bicycle, bluetooth speaker and portable welder. Enjoy the of DIY creativity [What You Get]There is only 2 battery adapter, no battery,and this is not a chargerColour:blackMaterial: ABSPackage Contents:2 x WheelsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.